Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/27460
DC Field | Value | Language |
---|---|---|
dc.contributor.author | SUHASARIA, TUSHAR | en_US |
dc.contributor.author | BARATTA, Giuseppe | en_US |
dc.contributor.author | Ioppolo, S. | en_US |
dc.contributor.author | Zacharias, H. | en_US |
dc.contributor.author | PALUMBO, Maria Elisabetta | en_US |
dc.date.accessioned | 2020-09-21T16:09:54Z | - |
dc.date.available | 2020-09-21T16:09:54Z | - |
dc.date.issued | 2017 | en_US |
dc.identifier.issn | 0004-6361 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/27460 | - |
dc.description.abstract | Context. Carbon dioxide (CO<SUB>2</SUB>) is one of the most abundant species detected in icy grain mantles in star forming regions. Laboratory experiments have shown that CO<SUB>2</SUB> molecules are efficiently formed in the solid state under interstellar conditions. Specifically, solid CO<SUB>2</SUB> can be formed through energetic (e.g. UV photolysis, electron and ion bombardment) and non-energetic mechanisms (atom-addition reactions). <BR /> Aims: Here we investigate the role of low-energy cosmic-ray bombardment in the formation of solid CO<SUB>2</SUB> in quiescent dense molecular clouds. <BR /> Methods: We performed laboratory experiments to study the formation of CO<SUB>2</SUB> after ion irradiation with 200 keV H<SUP>+</SUP> of astrophysical relevant ice mixtures. Laboratory spectra are used to fit the profile of the CO<SUB>2</SUB> bending mode band observed at about 15.2 μm (660 cm<SUP>-1</SUP>) by the Spitzer Space Telescope in the line of sight to background sources. <BR /> Results: From a qualitative point of view, good fits to observations are obtained by considering either three or four laboratory components. From a quantitative point of view, a better result is obtained with four components, i.e. when a spectrum of CO<SUB>2</SUB> formed after ion irradiation of CH<SUB>3</SUB>OH ice is added to the fitting procedure. <BR /> Conclusions: Our results support the hypothesis that energetic processing of icy grain mantles is an efficient formation mechanism of CO<SUB>2</SUB> ice also in quiescent dark cloud regions, and indirectly suggest the presence of CH<SUB>3</SUB>OH in icy grain mantles in interstellar cold regions. | en_US |
dc.language.iso | eng | en_US |
dc.title | Solid CO2 in quiescent dense molecular clouds. Comparison between Spitzer and laboratory spectra | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1051/0004-6361/201730504 | en_US |
dc.identifier.scopus | 2-s2.0-85037524436 | en_US |
dc.identifier.isi | 000416942200012 | en_US |
dc.identifier.url | https://www.aanda.org/articles/aa/abs/2017/12/aa30504-17/aa30504-17.html | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 608 | en_US |
dc.relation.firstpage | A12 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | ASTRONOMY & ASTROPHYSICS | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2017A&A...608A..12S | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.grantfulltext | open | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
item.languageiso639-1 | en | - |
item.openairetype | Article | - |
item.cerifentitytype | Publications | - |
crisitem.journal.journalissn | 0004-6361 | - |
crisitem.journal.ance | E016240 | - |
crisitem.author.dept | O.A. Catania | - |
crisitem.author.dept | O.A. Catania | - |
crisitem.author.orcid | 0000-0002-4755-4719 | - |
crisitem.author.orcid | 0000-0002-3688-160X | - |
crisitem.author.orcid | 0000-0002-9122-491X | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
2017AA.pdf | Pdf editoriale | 1.08 MB | Adobe PDF | View/Open |
Page view(s)
47
checked on Mar 28, 2024
Download(s)
19
checked on Mar 28, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are published in Open Access, unless otherwise indicated.